The correct answer is c motor end plate.
The motor end plate is a specialized region of the sarcolemma, which is the membrane surrounding a muscle fiber. This area is crucial for the communication between nerve cells and muscle cells. When a nerve impulse reaches the neuromuscular junction, acetylcholine is released from the nerve terminal and binds to receptors located specifically at the motor end plate. This binding triggers a series of events that ultimately lead to muscle contraction. The presence of acetylcholine receptors in this specific area allows for the effective transmission of signals from the nervous system to the muscle fibers, facilitating movement.